For the more adventurous, suitable Tracker music files can be found on the internet. If you wish to compose your own then the easy option is to use Milky Tracker on an Apple or Microsoft computer. On RISC OS, Digital Symphony is the best sample sequencer, although it is now hard to obtain and only works on the Risc PC.
Assuming a tracker file has been found or created, first set the filetype correctly.
Here is a reminder of the Tracker filetypes that Flicker will accept.
Now double click or drag and drop the tracker file to Flicker. Do not worry about what Flicker is already playing or showing. Go to This flune and close the padlock. The screen shot below shows a Digital Symphony file imported into Flicker. With the padlock closed notice that the Save flune option is available.
The padlock can be unlocked and the This flune details edited. Alternatively, this can be done at a later date. Close the padlock and save the flune.
The flune can be kept as a separate music file. If double clicked or drag and dropped to Flicker it will replace the soundtrack to the animation, slide show or presentation currently running. Again, the padlock will open to prevent an accidental save with a replaced soundtrack. However, by closing the padlock and saving as a flick, what was originally a tracker file from the internet is the soundtrack for a flick.